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Connecting an IR (Infrared) sensor with an Arduino is a common task in various applications, such as obstacle detection, proximity sensing, and object counting. Here’s a step-by-step guide on how to connect and use an IR sensor with an Arduino Uno:

Components Needed:

1. Arduino Uno
2. IR sensor module (e.g., IR proximity sensor or IR obstacle avoidance sensor)
3. Breadboard and jumper wires

IR Sensor Pinout:

IR sensors can vary in pin configuration depending on the module. However, most basic IR sensor modules have three pins:

• VCC: Power supply (typically +5V)
• GND: Ground (connect to Arduino GND)
• OUT: Signal output (digital or analog depending on the module)

Wiring Instructions:

1. Connect Power and Ground:

   • VCC of the IR sensor to 5V on the Arduino.
   • GND of the IR sensor to GND on the Arduino.

2. Connect Signal Output:

   • OUT pin of the IR sensor to a digital input pin on the Arduino (e.g., digital pin 2).

   • IR sensor pinout

     

     interfacing of ir sensor with arduino Example:

     // Define the pin connected to the IR sensor
     const int irSensorPin = 2;

     void setup() {
       // Initialize serial communication
       Serial.begin(9600);
       
       // Set IR sensor pin as an input
       pinMode(irSensorPin, INPUT);
     }

     void loop() {
       // Read the state of the IR sensor
       int sensorValue = digitalRead(irSensorPin);
       
       // Print the sensor value (HIGH or LOW) to Serial Monitor
       Serial.print("IR Sensor Value: ");
       Serial.println(sensorValue);
       
       // Add a small delay to stabilize readings
       delay(100);
     }

      

     interfaceing diagram: